Alco Controls

78
Alco Controls
Spare Parts
Correction Tables for Series ZZ
Valve selection for operating conditions other than
specified on page 77:
Q n = Q o x K t x K∆p
Liquid Correction Factor K t
Temperature R 22 Evaporating Temperature
entering valve °C
°C -45 -50 -55 -60 -65 -70
+10 1,02 1,21 1,42 1,66 1,97 2,30
0 0,94 1,12 1,30 1,53 1,75 2,02
-10 0,88 1,04 1,21 1,42 1,61 1,83
-20 0,82 0,98 1,13 1,32 1,50 1,71
-30 0,77 0,92 1,05 1,23 1,39 1,56
-40 0,86 1,00 1,15 1,30 1,47
-50 1,09 1,25 1,42
Correction Factor K∆p
For the proper sizing of thermo expansion valves in cases of subcooling
of more than 15K please use additionally the correction
factors on page 60 of this brochure.
Liquid Correction Factor K t
Temperature R 23 Evaporating Temperature
entering valve °C
°C -45 -50 -55 -60 -65 -70 -75 -80 -85 -90 -95 -100
-10 1,18 1,18 1,19 1,21 1,28 1,48 1,86 2,21 2,73 3,36 4,15 5,06
-15 1,11 1,11 1,12 1,13 1,20 1,39 1,74 2,07 2,56 3,14 3,88 4,72
-20 1,04 1,05 1,06 1,07 1,13 1,31 1,64 1,95 2,41 2,95 3,64 4,43
-25 0,99 0,99 1,00 1,01 1,07 1,24 1,55 1,84 2,27 2,78 3,43 4,17
-30 0,94 0,94 0,95 0,96 1,02 1,17 1,47 1,75 2,15 2,63 3,24 3,94
-35 0,89 0,90 0,91 0,91 0,97 1,12 1,40 1,66 2,04 2,50 3,08 3,74
-40 0,85 0,86 0,86 0,87 0,92 1,06 1,33 1,58 1,94 2,38 2,92 3,55
-45 0,82 0,83 0,83 0,88 1,02 1,27 1,51 1,85 2,27 2,79 3,38
-50 0,79 0,80 0,84 0,97 1,22 1,44 1,77 2,17 2,86 3,23
-55 0,76 0,81 0,93 1,17 1,38 1,70 2,07 2,55 3,09
-60 0,78 0,90 1,12 1,33 1,63 1,99 2,44 2,96
-65 0,86 1,08 1,27 1,57 1,91 2,35 2,84
-70 1,04 1,23 1,51 1,84 2,26 2,73
-75 1,18 1,45 1,77 2,18 2,63
-80 1,40 1,71 2,10 2,54
Correction Factor K∆p
Type Part No.
Gasket Set for ZZ Series Valves X 13455 -1 027 579
Service Tool for ZZ Series X 99999 800 005
Bronze screws for following flange types (ZZ-Valves):
C501 , 9761 , 6346 , A576 Screw BZ 32 803 575
9152, 9153, 10331 , 10332 Screw BZ 48 803 576
Q n : Nominal valve capacity
Q o : Required cooling capacity
K t : Correction factor for evaporating and liquid
temperature
K∆p: Correction factor for pressure drop at valve
∆p (bar) 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 6,0 7,0
K∆p 4,40 3,10 2,50 2,20 2,00 1,80 1,70 1,60 1,50 1,40 1,30 1,20
∆p (bar) 8,0 9,0 10,0 11,0 12,0 13,0 14,0 15,0 16,0 17,0 18,0 19,0
K∆p 1,10 1,04 0,98 0,94 0,90 0,87 0,83 0,81 0,78 0,76 0,74 0,72
∆p (bar) 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 6,0 7,0
K∆p 4,20 2,97 2,43 2,10 1,88 1,72 1,59 1,49 1,40 1,33 1,21 1,12
∆p (bar) 8,0 9,0 10,0 11,0 12,0 13,0 14,0 15,0 16,0 17,0 18,0 19,0
K∆p 1,05 0,99 0,94 0,90 0,86 0,82 0,79 0,77 0,74 0,72 0,70 0,68
A2.5.1/1003/E